CPhill

Yes...... putting a "negative" into "-x" would result in a positive!!!......glad I could be a "lifesaver"....!!!

(y^3)^3  =  y^9

We just need to evaluate

cos^-1 [ ( 3√3  + 4 ) / 10 ] = about 23.13 degrees.....this could also be a 4th quadrant angle = [ 360 - 23.13 ] degrees = 336.87 degrees

if a=-2 b=4 and c=4 what is the value to the following question 2ab-c2

We have

2(-2)(4) - (4)(2) =

(-4)(4) - 8 =

-16 - 8 =

-24

For the first, remember that  ( a^m ) ⁿ  =   a ^{m x n}

So we have

(2 ³ ) ²  = 2 ^{3 x 2} =   2 ⁶  = 64

For the second, remember the rule that  aⁿ x a^m   =  a^m+n

So...... 2³ x 2² = 2³⁺² = 2⁵  = 32

Does that help ??

1.95×10−4M/s×1.17×10−4 M/s

This is just

(1.95 x 1.17) x (10^-4 x 10^-4)     

So we have

2.2815 x 10^-8

Remember the rule that  aⁿ x a^m   =  a^m+n

So...... 3⁴ x 3⁴ = 3⁴⁺⁴ = 3⁸

Does that help ??

This is correct, Melody.......!!!!

Another way to look at this is.......call the amount of money the person bets = B...........and call the amount of money he wins  = 3B

So the expected value of any bet is

3B(1/18) - B(17/18) =

3B/18 - (17B)/18  =

-(14B)/18 =

-.7778 B 

In other words......the player stands to lose about 78 cents on each dollar he bets........

(Contrast this to the game of roulette where, on the "American Wheel," the player stands to lose a little more than 5 cents per dollar bet on any spin !!! )

Be patient........Rosala usually has a few tricks up her sleeve that will make us ALL laugh !!!